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    DEPTH BUFFER COMPRESSION
    2.
    发明公开
    DEPTH BUFFER COMPRESSION 有权
    深度缓存压缩

    公开(公告)号：EP2191443A2

    公开(公告)日：2010-06-02

    申请号：EP08830243.5

    申请日：2008-09-12

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： WENNERSTEN, Per ,  STRÖM, Jacob

    IPC分类号： G06T9/00 ,  G06T15/40

    CPC分类号： G06T9/00 ,  G06T15/405 ,  H04N19/119 ,  H04N19/12 ,  H04N19/15 ,  H04N19/176 ,  H04N19/42 ,  H04N19/46

    摘要： Device, computer readable medium, and method for selecting compression modes to be applied in a depth buffer (20). The method includes obtaining values corresponding to a tile (30) of the depth buffer (20), selecting a first compression mode (34) from a first plurality of compression modes, compressing the values of the tile (30), writing the compressed values into a first block, based on the first mode (34), and using a preset number of primary bits (34) to store information related to at least one of the first mode (34) and a compression size of the first block, selecting a set of secondary compression modes (32) from a second plurality of compression modes, determining a number of sub-tiles (28), that make up the tile (30), compressing values of the sub-tiles, writing the compressed values into a second block, based on the set of secondary modes (32), and using the same preset number of primary bits (34) to store information related to at least one of the set of secondary modes (32) and a compression size of the second block, comparing the compression size of the tile (30) to the compression size of the sub-tiles (28), choosing the first mode (34) or the set of secondary modes (32) and a corresponding tile size based on a result of the comparing, and storing the selected compressed tile or sub-tiles into the depth buffer (20) and writing into the preset number of primary bits (34) information related to the chosen first mode (34) or set of secondary compression modes (32) or a corresponding size.

    PREDICTION-BASED IMAGE PROCESSING
    4.
    发明公开
    PREDICTION-BASED IMAGE PROCESSING 有权
    基于预测的图像处理

    公开(公告)号：EP2245596A1

    公开(公告)日：2010-11-03

    申请号：EP08750073.2

    申请日：2008-05-06

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： STRÖM, Jacob ,  WENNERSTEN, Per

    IPC分类号： G06T9/00 ,  G06T15/40

    CPC分类号： G06T9/00

    摘要： A pixel block (300) is compressed by selecting a start depth value and a restart depth value based on the multiple depth values of the pixels (310-318) in the block (300). A respective plane representation (430) indicative of which plane of a start or restart depth value plane is determined for the pixels (311-318). These representations (430) are employed for selecting a pixel set comprising at least one other pixel (312, 314-317) in the block (300) for a pixel (318) to be encoded. The depth value(s) of the pixel(s) (312, 314-317) in the set are used for determining a prediction of the depth value of the pixel (318). The depth value and the prediction are employed for calculating a prediction error, which is encoded. The compressed pixel block (400) comprises the encoded prediction errors (460), a start value representation (420), a restart value representation (430) and the plane representations (440).

    摘要翻译： 通过基于块（300）中的像素（310-318）的多个深度值选择开始深度值和重新开始深度值来压缩像素块（300）。 指示像素（311-318）的开始或重新开始深度值平面的哪个平面的相应平面表示（430）。 采用这些表示（430）来选择包括块（300）中的至少一个其他像素（312,314-317）的像素集以用于待编码的像素（318）。 该组中的一个或多个像素（312,314-317）的深度值被用于确定像素（318）的深度值的预测。 深度值和预测被用于计算被编码的预测误差。 压缩像素块（400）包括编码的预测误差（460），起始值表示（420），重新启动值表示（430）和平面表示（440）。

    SAMPLE ADAPTIVE FILTERING WITH OFFSETS
    5.
    发明公开
    SAMPLE ADAPTIVE FILTERING WITH OFFSETS 有权
    “样品自适应”FILTERUNG麻省理工学院

    公开(公告)号：EP2834980A2

    公开(公告)日：2015-02-11

    申请号：EP13762601.6

    申请日：2013-03-15

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： ANDERSSON, Kenneth ,  SJÖBERG, Rickard ,  WENNERSTEN, Per

    IPC分类号： H04N7/26

    CPC分类号： H04N19/117 ,  H04N19/136 ,  H04N19/146 ,  H04N19/172 ,  H04N19/176 ,  H04N19/42 ,  H04N19/463 ,  H04N19/70 ,  H04N19/82

    摘要： A method,a filtering control device (150), a computer program and a computer program product for processing a first picture in a sample adaptive filtering procedure are disclosed. The first picture is reconstructed from video data. The filtering control device (150) obtains (201) an offset magnitude from the video data. The offset magnitude indicates a magnitude of a sample adaptive offset to be applied in the sample adaptive filtering procedure. The filtering control device (150) obtains (204) an offset sign from the video data. The offset sign indicates a sign of the sample adaptive offset. The filtering control device (150) determines (205) the sample adaptive offset based on the offset magnitude and the offset sign. Moreover, the filtering control device (150) processes (207), in the sample adaptive filtering procedure, at least a portion of the first picture while applying the sample adaptive offset.

    摘要翻译： 公开了一种用于在样本自适应滤波过程中处理第一图像的方法，滤波控制装置，计算机程序和计算机程序产品。 从视频数据重建第一张照片。 滤波控制装置从视频数据获得偏移幅度。 偏移幅度表示在样本自适应滤波过程中应用的采样自适应偏移的幅度。 滤波控制装置从视频数据中获得偏移符号。 偏移符号表示样本自适应偏移的符号。 滤波控制装置基于偏移幅度和偏移符号来确定采样自适应偏移。 此外，滤波控制装置在采样自适应滤波过程中处理第一图像的至少一部分，同时应用采样自适应偏移。

    METHOD AND DEVICE FOR STORING A COMPRESSION RATIO INDICATION IN A PIXEL VALUE BUFFER IN TILE ENCODING
    6.
    发明公开
    METHOD AND DEVICE FOR STORING A COMPRESSION RATIO INDICATION IN A PIXEL VALUE BUFFER IN TILE ENCODING 审中-公开
    方法和设备，用于存储压缩比显示像素值缓冲区瓷砖编码

    公开(公告)号：EP2652950A1

    公开(公告)日：2013-10-23

    申请号：EP10860879.5

    申请日：2010-12-14

    申请人： Telefonaktiebolaget L M Ericsson (PUBL)

    发明人： STRÖM, Jacob ,  WENNERSTEN, Per

    IPC分类号： H04N7/26 ,  G06T9/00

    CPC分类号： G06T9/005 ,  G06T9/00 ,  H04N19/428 ,  H04N19/46 ,  H04N19/91

    摘要： A tile (1) of pixels (6) is encoded by variable length encoding blocks (3-9) of pixels (10) constituting different subsets of the tile (1) to form sequences of symbols (23-29) as encoded representations of the pixel values. A respective size indication (33-39, 52, 54, 56, 58) is determined for each set (12, 14) of at least block. A size indication (33-39, 52, 54, 56, 58) is representative of a compression ratio of a combined sequence (23-29, 51, 53, 55, 57) corresponding to the at least one sequence of symbols (23- 29) obtained for the at least one block of the set (12, 14). The combined sequences (23-29, 51, 53, 55, 57) are arranged in a pixel value buffer (80) in a buffer memory (20). The size indication (32-39, 52, 54, 56, 58) determined for a given set (12, 14) is also stored in the pixel value buffer (80) in the buffer memory (20) to precede, according to a reading order of the pixel value buffer (80), the combined sequence (23-29, 51, 53, 55, 57) of the given set (12, 14).

    CO-COMPRESSION AND CO-DECOMPRESSION OF DATA VALUES
    7.
    发明公开
    CO-COMPRESSION AND CO-DECOMPRESSION OF DATA VALUES 审中-公开
    CO压缩AND CO减压数据值

    公开(公告)号：EP2612298A1

    公开(公告)日：2013-07-10

    申请号：EP10856783.5

    申请日：2010-09-03

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： STRÖM, Jacob ,  WENNERSTEN, Per

    IPC分类号： G06T9/00 ,  H03M7/30

    CPC分类号： H03M7/30 ,  G06T9/008 ,  G10L19/00 ,  H03M7/3082 ,  H04N19/126 ,  H04N19/51

    摘要： A first and a second data value are co-compressed by generating a sequence of symbols having a most significant symbol that is the most significant symbol of a compressed representation of the first data value and a least significant symbol that is the most significant symbol of a compressed representation of the second data value. The compressed representation of the first data value corresponds to at least a portion of the symbols of the sequence of symbols starting from the most significant symbol and extending towards the least significant symbol in a first reading direction. The compressed representation of the second data value also corresponds to at least a portion of the symbols of the sequence of symbols, however, starting from the least significant symbol and extending in an opposite reading direction towards the most significant symbol.

    TILE ENCODING AND DECODING
    10.
    发明公开
    TILE ENCODING AND DECODING 审中-公开
    砖的编码和解码

    公开(公告)号：EP2652707A1

    公开(公告)日：2013-10-23

    申请号：EP10860774.8

    申请日：2010-12-14

    申请人： Telefonaktiebolaget L M Ericsson (PUBL)

    发明人： STRÖM, Jacob ,  WENNERSTEN, Per

    IPC分类号： G06T9/00 ,  H03M7/40

    CPC分类号： G06T9/005 ,  G06T9/00 ,  H04N19/176 ,  H04N19/42 ,  H04N19/436 ,  H04N19/69 ,  H04N19/91

    摘要： A tile (1) of pixels (6) is encoded by variable length encoding at least a first block (4) of pixels (6) into a first sequence (10) of symbols and a second block (5) of pixels (6) into a second sequence (20) of symbols. The symbols of the first and second sequences (10, 20) are co-organized into a combined sequence (70) of symbols in which the symbols of the first sequence (10) are readable in a first reading direction and at least a portion of the symbols in the second sequence (20) are readable in a second, opposite reading direction. The encoding of the tile (1) to form one or more combined sequences (70) significantly reduces the bandwidth requirements when writing the tile (1) to a pixel value buffer (9). The co-organization of the first and second sequences (10, 20) enables parallel reading and decoding of the first and second sequences (10, 20) from the pixel value buffer (9), thereby reducing any decoding latency.